Portable heater



y ,1959 cs. BARNES PORTABLE HEATER Filed April 23, 1953 A v V INVENTOR- GLE N N BARNES BY United, States Patent :Ofiice Patented July 28, 1959 PORTABLE HEATER Glenn Barnes, Dayton, Ohio, assignor to Master Vibrator Company, Dayton, Ohio, a corporation of Ohio Application April 23, 1953, Serial No. 350,741

3 Claims. (Cl. 263-19) stood, is installed for portability on a maneuverable support.

, The housing 33 is open at its ends for a free flow of air longitudinally therethrough. The left hand end thereof is the outlet, and, as indicated, may have a deflector element 34 mounted thereon. The right hand end is the inlet and receives a fan 35 rotated by a motor 36 in a direction to force air through the housing toward the outlet end thereof.

A combustion chamber 37 is defined in the housing 33 by a pair of opposed container like members 38 and 39 having their open ends in telescoping spaced apart relation substantially as indicated. The external or shroud member 38 has its closed end facing the inlet end of the housing and is held by brackets 41 in such spaced apart relation to the side walls of the housing 33 as to ers whereby they may not only be economically manufactured, but will be more efficient in use, uniform in results obtained, having a minimum number of parts and be unlikely to get out of repair.

It is an object of the invention to provide a generally new space heater of simple and rugged construction and readily portable.

Another object of the invention is to obviate the use of a flue as a part of or in conjunction with the space heater.

A further object of the invention is to allow the gases of combustion to escape from the heater mixed with or as a part of the heated air output without, however, raising the toxic .gas content in such output to a harmful or objectionable level.

Still another object of the invention is to provide a combustion chamber, in a space heater or like device, constructed and arranged to retard the escape of combustible products therefrom whereby to bring about substantially complete combustion in the chamber.

A still further object of the invention is to modify and simplify the construction and mode of operation of space heaters and like devices by drawing from a single air stream the air for heating and the air for supporting combustion in the combustion chamber.

A further object of the invention is to provide a heater having the advantageous structural features, the inherent .meritorious characteristics and the mode of operation herein set forth, or their equivalents.

With the above primary and other incidental objects in view as will more fully appear in the specification, the invention intended to be protected by Letters Patent consists of the features of construction, the parts and combinations thereof, and the mode of operation, as hereinafter described or illustrated in the accompanying drawings, or their equivalents.

In the accompanying drawings wherein is shown one but not necessarily the only form of embodiment of the invention,

Fig. 1 is a view in longitudinal section and partly diagrammatic of a space heater housing in accordance with the invention; and

Fig. 2 is a view in perspective, partly broken away of the combustion chamber of Fig. 1, shown at a reduced scale.

Like parts are indicated by similar characters of reference throughout the several views.

The illustrated form of the invention is simple and inexpensive of construction. Referring to the drawings, the main housing in this form of the invention is a generally cylindrical member 33, which, it will be underdefine a relatively restricted annular air passage 42. The internal or shield member 39 has its closed end facing the outlet end of the housing and is supported by brackets 43 in such position so as to prevent immediate discharge of the combustion gases by providing a circuitous passage 44 therefor. Additional surface is provided within member 39 by the insertion of an annular ring 40. This ring is maintained in spaced relation with the interior of the member 39 but flush with the open end thereof. The evacuation of the gases is aided by flow through the passage 42, as in the previous described embodiment, and there is a common discharge of the combustion gases and the heated air with a relatively small content of carbon monoxide and carbon dioxide, also as in the previously considered form of the invention.

The fuel burner, indicated largely diagrammatically at 45, is received in the housing 33 between the fan and the shroud 39 with its nozzle end projecting through the closed end of the shroud 38 into the chamber 37. So disposing the fuel burner provides for increased com pactness and furthermore is productive of a generally new construction and mode of operation in space heaters wherein the air for heating and the air to support combustion are drawn from the same air current. Thus as indicated by the directional arrows a part of the air drawn into the inlet end of the housing 33 flows to and through the passage 42 where it is heated by contact with and radiation from the shroud 38, while another part of the same air draft enters the fuel burner 45 and flows into the combustion chamber 37 From the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprise but one of several modes of putting the invention into effect.

Having thus described my invention, I claim: 1. A space heater, including a housing receiving a draft of forced air at one end thereof and discharging it M i n 2,896,933

other member having an open end received in the open end of said one member and a closed end facing in the direction of air flow, said other member being spaced from said one member to define a longitudinally extended circuitous flow path from the interior of said other member to the exterior of the combustion chamber and extending to restrict he flow passage through said housing adjacent said opposite end of said housing and beyond said one member, and a fuel burner received in the combustion chamber through the closed end of said one member and extending toward and substantially into said other member.

2. A space heater including, a housing, said housing having generally axially aligned openings at its extremi ties providing an inlet thereto and an outlet therefrom, means for inducing a forced draft through said housing mounted in said inlet opening, a burner mounted in said housing, a cup shaped combustion chamber having its closed end adjacent said draft inducing means containing said burner, said chamber being supported in concentric closely spaced relation to said housing intermediate its extremities providing an air passage thereabout, a second cup-shaped element nesting its open end in the open end of said combustion chamber cupping about said burner and defining a longitudinally extended passage thereabout with said chamber, the closed end of said cup-shaped element projecting from said chamber to define a re stricted air passage thereaboutwith said housing adjacent its outlet communicating with said previously mentioned passages whereby substantially complete combustion occurs Within said chamber and heated air is discharged from said housing outlet containing a relatively small amount of carbon dioxide and carbon monoxide.

3. A space heater including a housing, said housing openings at its extremities providing an inlet thereto and a reduced outlet therefrom, means for inducing a forced draft through said housing mounted in said inlet opening, a burner mounted centrally of said cylindrical housing, said burner projecting into the bottom of a cup-shaped member the sides of said cup-shaped member being axially spaced from the sides of the housing, a second cup shaped member mounted in the housing concentric with the side wall of the first cup-shaped member, the side Wall of the second cup-shaped member terminating short of the bottom of the first cup-shaped member, the wall of the first cup-shaped member in relation to the wall of the housing forming a passage for forced air and the walls of the second cup-shaped member in relation to the walls of the first cup-shaped member forming a tortuous path for the products of combustion.

References Cited in the file of this patent UNITED STATES PATENTS 1,863,391 Bluemel June 14, 1932 2,018,505 Suhr Oct. 22, 1935 2,164,954 Stephens July 4, 1939 2,386,807 Leslie Oct. 16, 1945- 2,525,206 Clarke Oct. 10, 1950 2,541,332 Campbell Feb. 13, 1951 2,606,014 Baumann Aug. 5, 1952 2,609,040 Aronson' Sept. 2, 1952 FOREIGN PATENTS 662,785 Great Britain Dec. 12, 1951 

